Throttle-valve and brake.



PATENTED OCT. 24, 1905 N W. FLETCHER.

THROTTLE VALVE AND BRAKE.

APPLICATION FILED JAN. 3, 1905.

PATENTED OCT. 24:, 1905.

N. W. FLETCHER.

THROTTLE VALVE AND BRAKE.

APPLICATION FILED JAN.3,1905.

2 SHEETSSHEET 2.

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five/afar lgrmww .FIIID TTNTTED STATES PATENT OFFTEE.

NATHAN W. FLETCHER, OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR TO TURBINE MOTOR TOOL COMPANY, OF CHICAGO, ILLINOIS, A CORPO- RATION OF ILLINOIS.

THROTTLE-VALVE AND BRAKE.

Specification of Letters Patent.

Patented Oct. 24, 1905.

To a 11/71/0711 it may concern:

Be it known that I, NATHAN W. FLETCHER, a citizen of the United States, and a resident of Chicago Heights, in'the county of Cook and State of Illinois, have invented certain new and useful Improvements in Throttle- Valves and Brakes; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to to the accompanying drawings, and to the let ters of reference marked thereon, which form a part of this specification.

This invention relates to an improved throttle-valve, such as-is used in connection I 5 with portable motors for controlling the supply of pressure fluid thereto and of the kind embracing a rotative tubular hand grip which forms one of the handles of the motor and by which movement is given to the valve to open and close the same.

The invention also relates to a brake device for arresting the movement of the rotating part or member of a turbine or other rotary motor and which is adapted for actua 2 5 tion by the hand-grip or handle which operates the throttlevalve.

The invention consists in the matters hereinafter described, and pointed out in the appended claims.

0 As shown. in the accompanying drawings, Figure 1 is a view in side elevation. of parts of the rotative and non-rotative members of a turbine-motor together with a throttle-valve and brake embodying my invention. Fig. 2

3 5' is a plan view thereof. Fig. 3 is a plan section taken axially through the throttle valve on line 3 3 of Fig. 1. Fig. 4 is a detail 'side view of the throttle-valve with parts broken away to show the interior construe- 40 tion thereof. Fig. 5 is a longitudinal section like Fig. 8, showing a changed position of the parts. Fig. 6 is a cross-section taken on line 6 6 of Fig. 3.

As shown in said drawings, A indicates the non-rotative part or member of a turbinemotor, and B indicates the wheel or rotary member thereof which is provided with annularly-arranged blades or buckets I) b and also with a gear-wheel B, by means of which motion is transmitted from the rotative member B to a part to be driven thereby.

A indicates a supply-pipe which is attached to the non-rotative part A of the motor and through which compressed air or other pressure fluid is supplied to the motor.

C indicates a flexible supply pipe or hose which is connected with and supplies the compressed air or pressure fluid to the pipeA.

The throttle-valve, which constitutes one of the features of my invention, is mounted on the outer end of the pipe A and operates to cut off or control the supply of air to the motor from the hose or flexible supply-pipe C. Said throttle-valve is operated by a rotative sleeve or tubular hand-grip I), which joins the outer end of the pipe A with a tube or thimble E, to which the hose C is secured and which is adapted to be turned or rotated on said pipe A and thimble E for open ing and closing the throttle-valve. Said airsupply pipe A has at its outer end an en larged externally-screw-threaded part A which is engaged by internal screw-threads in the inner end of the sleeve D. Within said sleeve D is a cylindric valve-casing F, having screw-threaded engagement at its outer end with the thimble E, to which the supply-hose is attached. The sleeve D has an inwardly-extending annular flange (Z at its outer end whichengages a groove formed by flanges on the casing F and thimble E, so that said sleeve may be turned. on the casing, but will have no endwise movement relatively thereto. The casing F has at its inner end. a wall or diaphragm], in which is formed a port or opening surrounded by an outwardlyfacing valve-seat f. A valve-disk G is located within the casing F and its on the valveseat, said disk being attached to a stem G, which slides at its outer end in a guide-aperture formed in a perforated wall e at the inner end of the thimble E. The valve-disk G is provided with a central extension which projects inwardly past the inner end wall of the valve-casing and is adapted to bear on the central part of an open frame or spider H, Fig. 6, on the adjacent end of the supply-pipe A. In the particular form of valve-disk shown in the drawings the said disk has the form of a cone, the apex of which constitutes the central extension referred to and bears centrally on the spider H, the arms of which rest in notches formed in the end of the screw-threaded part A of the pipe A. A coiled spring I surrounds the valve-stem G and is held in compression between the end wall 6 and the valve-disk G, so that it tends to hold said disk pressed against its seat.

From the construction in the throttle-valve described it will be manifest that the tubu lar hand-grip D serves to connect two separated parts of the air-supply pipe formed in one instance by the pipe A and in the other by the valve casing F and the attached thimble E, and that by the turning of said hand-grip said separated parts are given relative endwise movement in a manner to effect the actuation of the valve-disk to open or close the valve.

hen in the use of a valve constructed as described, the sleeve D is turned in a direction to screw it farther upon the end of the supply-pipe A, the pressure of the spider H on the valve-disk G will force the latter backwardly from its seat and air will be admitted according to the extent to which the sleeve is turned and the valve is opened. By turning the sleeve backward the valve-disk will be permitted to seat itself under the action of the spring I, and the valve will be closed. The screw-threads on the pipe A and the sleeve D are made with considerable inclination or pitch, as seen in Fig. 4, so that the valve may be opened or closed by the turning of the sleeve a part only of a revolution or through a short angular distance.

In connection with a throttlevalve adapted for actuation by a tubular sleeve forming a hand-grip, as set forth, I have provided a brake for arresting the rotation of the disk B when the air-supply is cut off by the throttle-valve for stopping the motor, the same being constructed as follows: J indicates a brake-lever which is pivoted 011 the supplypipe A, and the inner end of which extends over the adjacent edge of the wheel B of the motor and is provided with a brake-shoe j,

which is adapted to bear on the outer face of.

said wheel. A coiled spring K, held in compression between the outer arm of the lever J and the air-pipe A, tends to hold the brakeshoe in contact with the disk. The outer end of the lever J extends into a groove or recess a, formed in the side of the enlarged screwthreaded end A of the pipe A, and the end of the lever is tapered and has an oblique or cam surface j on its outer edge, the tapered end of the lever being adapted to extend beneath the inner end of the sleeve D, the edge of which bears against the oblique surface j. These parts are so arranged that when the sleeve D is screwed outwardly far enough to permit the closing of the throttle-valve the brake-lever will be released and the brake shoe will be forced by the actuating-spring against the disk B. When, however, the sleeve is turned to open the throttlevalve, its inward movement will by its pressure 011 the oblique or cam surface j force the adj a cent end of the brake-lever inward and relieve the pressure of the brake-shoe 011 said disk.

I claim as my invention 1. The combination with a supply-pipe, of a rotative tubular hand-grip which joins two separated parts of said supply-pipe and has screw-threaded engagement with one of said parts, a spring-actuated valve in one part of the supplypipe, having a part which is acted upon by the other part of the supply-pipe to effect the opening or closing of the valve when said parts of the pipe are given relative endwise movement by the turning of the hand-grip.

2. The combination with a supply-pipe, of a rotative tubular hand-grip which joins two separated parts of said supply-pipe and has screw-threaded engagement with one of said parts, and a valve in one of said parts of the supply-pipe embracing a valve-seat and a spring-actuated valvedisk which is movable in a direction endwise of the pipe and is provided with a projecting part adapted for contact with the other part of the supply-pipe to effect the opening or closing of the valve when the said parts of the supply-pipe are given relative endwise movement by the turning of said hand-grip.

3. The combination with a supply-pipe, of a rotative tubular hand-grip which joins two separated parts of said supply-pipe and has screw-threaded engagement with one of said parts of the supply-pipe, one part of said supply-pipe being provided with a valve-seat and with a spring-actuated valve-disk, provided with an extension which projects through the valve-seat and is adapted for engagement with the other part of the supplypipe to effect the opening and closing of the valve when the two parts of the supply-pipe are given rotative endwise movement by the turning of said hand-grip.

4. The combination with a supply-pipe and a rotative tubular hand-grip which joins two separated parts of the supply-pipe, said handgrip being adapted to turn 011 both of said parts of the supply-pipe and having screw-threaded engagement with one of said parts, the other of said parts of the supplypipe having at its end a wall or diaphragm provided with a valve-seat, a valve-disk which is movable toward and from said seat in a direction endwise of the pipe, said valvedisk having an extension which projects through said seat and is adapted for engagement with the adjacent end of the screwthreaded part of the supply-pipe, and a spring acting on said valve-disk and tending to hold it in contact with said seat.

5. The combination with a supply-pipe, of a rotative tubular hand-grip which joins two separated parts of the said supply-pipe, and has screw-threaded engagement with one of said parts, the screw-threaded part of the supply-pipe being provided at its end within the sleeve with an open frame or spider, and. the other part of the supply-pipe being provided with a valve-scat, and a spring-actuated valve-disk provided with a central projection which extends through the valve-seat and is adapted for contact with said frame or spider.

The combination with the rotative part or member of a portable turbine-motor, and a supply-pi e for the motor provided with. a throttle-Va ve, of a brake adapted to act on the rotative member of the motor, and a hand-grip or actuating member which forms a handle for the motor and is connected with and operates both the throttle-valve and the brake.

7. The combination with the rotative member of a portable turbine-motor and a supply-pipe for the motor provided with a throttle-valve, of a brake adapted to act on' said rotative member of the motor, and a tubular rotative hand-grip on the supply-pipe which forms a handle for the motor and which is connected with and operates both the throttle-valve and brake.

8. The combination with the rotative member of a motor, and a supply-pipe for the said motor provided with a throttle-valve having a rotative and endwise-moving tubular hand-grip through which the valve is operated, a brake embracing a brake-lever provided with a brake-shoe adapted to bear on said rotative member of the motor and having an inclined or cam surface which is acted upon by the said hand-grip in its endwise movement.

9. The combination with the rotative member of a motor, and an air-supply pipe for said motor embracing two separate parts and provided with a throttle-valve, a rotative tubular hand-grip which joins the two separated parts of the air-pipe and has screw-threaded engagement with one of said parts, and a brake embracing a brake-lever having a bral e-shoe adapted to act upon said rotative member of the motor, and hav ing an inclined or cam surface ada )ted for engagement with said rotative han grip.

10. The combination with the non-rotative and rotative members of a motor, and a supply-pipe for said motor having two parts, one of which is rigidly attached to the nonrotative part of the motor, a rotative tubular hand-grip having screw-threaded engagement with the part of the supplypipe at tached to the non-rotative part of the motor, a throttle-valve in the supply-pipe which is opened and closed by relative endwise mo vement of the said parts of the supplypipe, and a brake embracing a lever pivoted in the non-rotative part of the motor and which extends endwise of the supply-pipe and has an inclined or cam surface which is engaged with and operated by said. hand-grip in its endwise movement.

In testimony that I claim the foregoing as my invention I a'l'liX my signature, in presence of two witnesses, this 19th day of December, A. l). 1904.

NATHAN W. FLETCHER. 

